package com.sky.aspect;


import com.fasterxml.jackson.databind.ser.Serializers;
import com.sky.annotation.AutoFIll;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;

import lombok.Singular;
import lombok.extern.slf4j.Slf4j;
import org.aopalliance.intercept.Joinpoint;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MemberSignature;
import org.aspectj.lang.reflect.MethodSignature;
import org.aspectj.weaver.JoinPointSignature;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;
import java.util.Arrays;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    //切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFIll)")
    public void autoFillPointCut(){}//切入点

    @Before("autoFillPointCut()")//通知，当切入点符合后面的表达式的时候就会执行
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行公共字段自动填充...");

        //获取到当前被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFIll autoFill = signature.getMethod().getAnnotation(AutoFIll.class);//获得方法上的注解对象
        OperationType operationType = autoFill.value();//获得数据库操作类型

//获取到当前被拦截的参数
        Object[] args = joinPoint.getArgs();
        if(args ==null|| args.length ==0){
            return;
        }
        Object entity = args[0];
        //准备赋值类型
        LocalDateTime now = LocalDateTime.now();
        Long currenId= BaseContext.getCurrentId();
        //准备赋值额参数
        if(operationType == OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currenId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currenId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }else if(operationType ==OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currenId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }
    }
}
